Why is the temperature difference between sunny and cloudy days relatively large?

It's sunny day and night, and the temperature difference will be greater, because the atmosphere weakens the solar radiation less during the day, and the solar radiation reaching the ground is strong and the temperature is high. At night, the atmospheric inverse radiation is weakened, and the heat returning to the ground is less, and the temperature is lower.

Both day and night are cloudy, and the temperature difference will be smaller, because the radiation of the atmosphere to the sun is weakened during the day, and the solar radiation reaching the ground is weak, and the temperature is lower than that in sunny days. At night, the enhanced atmospheric reverse radiation on cloudy days returns more heat to the ground, and the temperature is higher than that on sunny nights.

Extended data:

Precautions:

Prepare enough clothes, don't be afraid of trouble, and don't be afraid of trouble. Wear autumn and winter clothes in the morning and evening, and spring and summer clothes at noon.

Don't put away out-of-season clothes. Two clothes must be kept for one season and ready for use at any time. Even if you store it, you should take it out and wear it sooner or later. Wear thick clothes when you go out. You can take them off at any time when it is hot.

People who like to exercise in the morning and evening must pay attention to drinking a cup of warm water in the morning. When you go out, you must add a heavy sportswear to your thin sportswear. When the exercise is hot, you can take off your clothes and put them on casually, so you can continue your exercise.

Baidu encyclopedia-temperature difference

People's Daily Online-The highest temperature in Beijing today is 27℃, with a large temperature difference between day and night.